ref: f0ac2d01765f938a4f3656efef440cf2c1bca69d
dir: /sys/src/cmd/postscript/download/download.c/
/*
*
* download - host resident font downloader
*
* Prepends host resident fonts to PostScript input files. The program assumes
* the input files are part of a single PostScript job and that requested fonts
* can be downloaded at the start of each input file. Downloaded fonts are the
* ones named in a %%DocumentFonts: comment and listed in a special map table.
* Map table pathnames (supplied using the -m option) that begin with a / are
* taken as is. Otherwise the final pathname is built using *hostfontdir (-H
* option), *mapname (-m option), and *suffix.
*
* The map table consists of fontname-filename pairs, separated by white space.
* Comments are introduced by % (as in PostScript) and extend to the end of the
* current line. The only fonts that can be downloaded are the ones listed in
* the active map table that point the program to a readable Unix file. A request
* for an unlisted font or inaccessible file is ignored. All font requests are
* ignored if the map table can't be read. In that case the program simply copies
* the input files to stdout.
*
* An example (but not one to follow) of what can be in a map table is,
*
* %
* % Map requests for Bookman-Light to file *hostfontdir/KR
* %
*
* Bookman-Light KR % Keeping everything (including the map
* % table) in *hostfontdir seems like the
* % cleanest approach.
*
* %
* % Map Palatino-Roman to file *hostfontdir/palatino/Roman
* %
* Palatino-Roman palatino/Roman
*
* % Map ZapfDingbats to file /usr/lib/host/dingbats
*
* ZapfDingbats /usr/lib/host/dingbats
*
* Once again, file names that begin with a / are taken as is. All others have
* *hostfontdir/ prepended to the file string associated with a particular font.
*
* Map table can be associated with a printer model (e.g. a LaserWriter), a
* printer destination, or whatever - the choice is up to an administrator.
* By destination may be best if your spooler is running several private
* printers. Host resident fonts are usually purchased under a license that
* restricts their use to a limited number of printers. A font licensed for
* a single printer should only be used on that printer.
*
* Was written quickly, so there's much room for improvement. Undoubtedly should
* be a more general program (e.g. scan for other comments).
*
*/
#include <stdio.h>
#include <signal.h>
#include <sys/types.h>
#include <fcntl.h>
#include <sys/stat.h>
#include <string.h>
#include "comments.h" /* PostScript file structuring comments */
#include "gen.h" /* general purpose definitions */
#include "path.h" /* for temporary directory */
#include "ext.h" /* external variable declarations */
#include "download.h" /* a few special definitions */
char *temp_dir = TEMPDIR; /* temp directory - for copying stdin */
char *hostfontdir = HOSTDIR; /* host resident directory */
char *mapname = "map"; /* map table - usually in *hostfontdir */
char *suffix = ""; /* appended to the map table pathname */
Map *map = NULL; /* device font map table */
char *stringspace = NULL; /* for storing font and file strings */
int next = 0; /* next free slot in map[] */
char *residentfonts = NULL; /* list of printer resident fonts */
char *printer = NULL; /* printer name - only for Unix 4.0 lp */
char buf[2048]; /* input file line buffer */
char *comment = DOCUMENTFONTS; /* look for this comment */
int atend = FALSE; /* TRUE only if a comment says so */
FILE *fp_in = stdin; /* next input file */
FILE *fp_temp = NULL; /* for copying stdin */
/*****************************************************************************/
main(int agc, char *agv[])
{
/*
*
* Host resident font downloader. The input files are assumed to be part of a
* single PostScript job.
*
*/
argc = agc; /* other routines may want them */
argv = agv;
prog_name = argv[0]; /* just for error messages */
init_signals(); /* sets up interrupt handling */
options(); /* first get command line options */
readmap(); /* read the font map table */
readresident(); /* and the optional resident font list */
arguments(); /* then process non-option arguments */
done(); /* and clean things up */
exit(x_stat); /* not much could be wrong */
} /* End of main */
/*****************************************************************************/
init_signals(void)
{
/*
*
* Makes sure we handle interrupts properly.
*
*/
if ( signal(SIGINT, interrupt) == SIG_IGN ) {
signal(SIGINT, SIG_IGN);
signal(SIGQUIT, SIG_IGN);
signal(SIGHUP, SIG_IGN);
} else {
signal(SIGHUP, interrupt);
signal(SIGQUIT, interrupt);
} /* End else */
signal(SIGTERM, interrupt);
} /* End of init_signals */
/*****************************************************************************/
options(void)
{
int ch; /* return value from getopt() */
char *optnames = "c:fm:p:r:H:T:DI";
extern char *optarg; /* used by getopt() */
extern int optind;
/*
*
* Reads and processes the command line options.
*
*/
while ( (ch = getopt(argc, argv, optnames)) != EOF ) {
switch ( ch ) {
case 'c': /* look for this comment */
comment = optarg;
break;
case 'f': /* force a complete input file scan */
atend = TRUE;
break;
case 'm': /* printer map table name */
mapname = optarg;
break;
case 'p': /* printer name - for Unix 4.0 lp */
printer = optarg;
break;
case 'r': /* resident font list */
residentfonts = optarg;
break;
case 'H': /* host resident font directory */
hostfontdir = optarg;
break;
case 'T': /* temporary file directory */
temp_dir = optarg;
break;
case 'D': /* debug flag */
debug = ON;
break;
case 'I': /* ignore FATAL errors */
ignore = ON;
break;
case '?': /* don't understand the option */
error(FATAL, "");
break;
default: /* don't know what to do for ch */
error(FATAL, "missing case for option %c\n", ch);
break;
} /* End switch */
} /* End while */
argc -= optind; /* get ready for non-option args */
argv += optind;
} /* End of options */
/*****************************************************************************/
readmap(void)
{
char *path;
char *ptr;
int fd;
struct stat sbuf;
/*
*
* Initializes the map table by reading an ASCII mapping file. If mapname begins
* with a / it's the map table. Otherwise hostfontdir, mapname, and suffix are
* combined to build the final pathname. If we can open the file we read it all
* into memory, erase comments, and separate the font and file name pairs. When
* we leave next points to the next free slot in the map[] array. If it's zero
* nothing was in the file or we couldn't open it.
*
*/
if ( hostfontdir == NULL || mapname == NULL )
return;
if ( *mapname != '/' ) {
if ( (path = (char *)malloc(strlen(hostfontdir) + strlen(mapname) +
strlen(suffix) + 2)) == NULL )
error(FATAL, "no memory");
sprintf(path, "%s/%s%s", hostfontdir, mapname, suffix);
} else path = mapname;
if ( (fd = open(path, 0)) != -1 ) {
if ( fstat(fd, &sbuf) == -1 )
error(FATAL, "can't fstat %s", path);
if ( (stringspace = (char *)malloc(sbuf.st_size + 2)) == NULL )
error(FATAL, "no memory");
if ( read(fd, stringspace, sbuf.st_size) == -1 )
error(FATAL, "can't read %s", path);
close(fd);
stringspace[sbuf.st_size] = '\n'; /* just to be safe */
stringspace[sbuf.st_size+1] = '\0';
for ( ptr = stringspace; *ptr != '\0'; ptr++ ) /* erase comments */
if ( *ptr == '%' )
for ( ; *ptr != '\n' ; ptr++ )
*ptr = ' ';
for ( ptr = stringspace; ; next++ ) {
if ( (next % 50) == 0 )
map = allocate(map, next+50);
map[next].downloaded = FALSE;
map[next].font = strtok(ptr, " \t\n");
map[next].file = strtok(ptr = NULL, " \t\n");
if ( map[next].font == NULL )
break;
if ( map[next].file == NULL )
error(FATAL, "map table format error - check %s", path);
} /* End for */
} /* End if */
} /* End of readmap */
/*****************************************************************************/
readresident(void)
{
FILE *fp;
char *path;
int ch;
int n;
/*
*
* Reads a file that lists the resident fonts for a particular printer and marks
* each font as already downloaded. Nothing's done if the file can't be read or
* there's no mapping file. Comments, as in the map file, begin with a % and
* extend to the end of the line. Added for Unix 4.0 lp.
*
*/
if ( next == 0 || (printer == NULL && residentfonts == NULL) )
return;
if ( printer != NULL ) { /* use Unix 4.0 lp pathnames */
sprintf(buf, "%s/printers/%s", HOSTDIR, printer);
path = buf;
} else path = residentfonts;
if ( (fp = fopen(path, "r")) != NULL ) {
while ( fscanf(fp, "%s", buf) != EOF )
if ( buf[0] == '%' )
while ( (ch = getc(fp)) != EOF && ch != '\n' ) ;
else if ( (n = lookup(buf)) < next )
map[n].downloaded = TRUE;
fclose(fp);
} /* End if */
} /* End of readresident */
/*****************************************************************************/
arguments(void)
{
/*
*
* Makes sure all the non-option command line arguments are processed. If we get
* here and there aren't any arguments left, or if '-' is one of the input files
* we'll translate stdin. Assumes input files are part of a single PostScript
* job and fonts can be downloaded at the start of each file.
*
*/
if ( argc < 1 )
download();
else {
while ( argc > 0 ) {
fp_temp = NULL;
if ( strcmp(*argv, "-") == 0 )
fp_in = stdin;
else if ( (fp_in = fopen(*argv, "r")) == NULL )
error(FATAL, "can't open %s", *argv);
download();
if ( fp_in != stdin )
fclose(fp_in);
if ( fp_temp != NULL )
fclose(fp_temp);
argc--;
argv++;
} /* End while */
} /* End else */
} /* End of arguments */
/*****************************************************************************/
done(void)
{
/*
*
* Clean things up before we quit.
*
*/
if ( temp_file != NULL )
unlink(temp_file);
} /* End of done */
/*****************************************************************************/
download(void)
{
int infontlist = FALSE;
/*
*
* If next is zero the map table is empty and all we do is copy the input file
* to stdout. Otherwise we read the input file looking for %%DocumentFonts: or
* continuation comments, add any accessible fonts to the output file, and then
* append the input file. When reading stdin we append lines to fp_temp and
* recover them when we're ready to copy the input file. fp_temp will often
* only contain part of stdin - if there's no %%DocumentFonts: (atend) comment
* we stop reading fp_in after the header.
*
*/
if ( next > 0 ) {
if ( fp_in == stdin ) {
if ( (temp_file = tempnam(temp_dir, "post")) == NULL )
error(FATAL, "can't generate temp file name");
if ( (fp_temp = fopen(temp_file, "w+r")) == NULL )
error(FATAL, "can't open %s", temp_file);
unlink(temp_file);
} /* End if */
while ( fgets(buf, sizeof(buf), fp_in) != NULL ) {
if ( fp_temp != NULL )
fprintf(fp_temp, "%s", buf);
if ( buf[0] != '%' || buf[1] != '%' ) {
if ( (buf[0] != '%' || buf[1] != '!') && atend == FALSE )
break;
infontlist = FALSE;
} else if ( strncmp(buf, comment, strlen(comment)) == 0 ) {
copyfonts(buf);
infontlist = TRUE;
} else if ( buf[2] == '+' && infontlist == TRUE )
copyfonts(buf);
else infontlist = FALSE;
} /* End while */
} /* End if */
copyinput();
} /* End of download */
/*****************************************************************************/
copyfonts(char *list)
{
char *font;
char *path;
int n;
/*
*
* list points to a %%DocumentFonts: or continuation comment. What follows the
* the keyword will be a list of fonts separated by white space (or (atend)).
* Look for each font in the map table and if it's found copy the font file to
* stdout (once only).
*
*/
strtok(list, " \n"); /* skip to the font list */
while ( (font = strtok(NULL, " \t\n")) != NULL ) {
if ( strcmp(font, ATEND) == 0 ) {
atend = TRUE;
break;
} /* End if */
if ( (n = lookup(font)) < next ) {
if ( *map[n].file != '/' ) {
if ( (path = (char *)malloc(strlen(hostfontdir)+strlen(map[n].file)+2)) == NULL )
error(FATAL, "no memory");
sprintf(path, "%s/%s", hostfontdir, map[n].file);
cat(path);
free(path);
} else cat(map[n].file);
map[n].downloaded = TRUE;
} /* End if */
} /* End while */
} /* End of copyfonts */
/*****************************************************************************/
copyinput(void)
{
/*
*
* Copies the input file to stdout. If fp_temp isn't NULL seek to the start and
* add it to the output file - it's a partial (or complete) copy of stdin made
* by download(). Then copy fp_in, but only seek to the start if it's not stdin.
*
*/
if ( fp_temp != NULL ) {
fseek(fp_temp, 0L, 0);
while ( fgets(buf, sizeof(buf), fp_temp) != NULL )
printf("%s", buf);
} /* End if */
if ( fp_in != stdin )
fseek(fp_in, 0L, 0);
while ( fgets(buf, sizeof(buf), fp_in) != NULL )
printf("%s", buf);
} /* End of copyinput */
/*****************************************************************************/
lookup(char *font)
{
int i;
/*
*
* Looks for *font in the map table. Return the map table index if found and
* not yet downloaded - otherwise return next.
*
*/
for ( i = 0; i < next; i++ )
if ( strcmp(font, map[i].font) == 0 ) {
if ( map[i].downloaded == TRUE )
i = next;
break;
} /* End if */
return(i);
} /* End of lookup */
/*****************************************************************************/
Map *allocate(Map *ptr, int num)
{
/*
*
* Allocates space for num Map elements. Calls malloc() if ptr is NULL and
* realloc() otherwise.
*
*/
if ( ptr == NULL )
ptr = (Map *)malloc(num * sizeof(Map));
else ptr = (Map *)realloc(ptr, num * sizeof(Map));
if ( ptr == NULL )
error(FATAL, "no map memory");
return(ptr);
} /* End of allocate */
/*****************************************************************************/